I have a subdomain test.localhost defined in my hosts file. Visiting the site from other browsers (chrome/opera/etc) work but firefox returns an unknown app response. I've been dealing with this for the last month or two now, which is making it difficult to test in firefox. Any ideas what happened? It used to work before but no idea why it's not working now. I found that any *.localhost subdomain returns the same error (not just domains defined in my hosts file. localhost:port works fine as well.

